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Texas Instruments LMR50410Y5FQDBVRQ1
- Part No.:
- LMR50410Y5FQDBVRQ1
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6
- Datasheet:
-
LMR50410Y5FQDBVRQ1.pdf
- Description:
- IC REG BUCK 5V 1A SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:109
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Product details
Overview
LMR50410Y5FQDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade synchronous buck converter delivering 5.0 V fixed output at up to 1-A continuous load, operating from 4 V to 36 V input with 2.1-MHz fixed switching frequency, ±1% reference accuracy, and integrated high- and low-side MOSFETs in SOT-23-6 for body electronics power conditioning.
For engineers reviewing the LMR50410Y5FQDBVRQ1 datasheet, LMR50410Y5FQDBVRQ1 pinout, LMR50410Y5FQDBVRQ1 application, or LMR50410Y5FQDBVRQ1 equivalent, key selection considerations include its FPWM mode for constant-frequency operation, 5-V fixed output, thermal shutdown at 170°C, monotonic start-up with pre-biased output, and hiccup-mode short-circuit protection.
Technical Context
The LMR50410Y5FQDBVRQ1 implements fixed-frequency peak-current mode control with internal compensation, enabling stable regulation using minimal external components. Its FPWM operation ensures constant 2.1-MHz switching across full load range, eliminating PFM-induced frequency variation and minimizing output voltage ripple.
It integrates high-side (450 mΩ) and low-side (240 mΩ) NMOS switches, uses a precision 1.0-V internal reference for feedback, and features cycle-by-cycle current limiting, thermal shutdown at 170°C, and hiccup-mode recovery during sustained overloads - all optimized for automotive ambient temperatures from –40°C to 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - supports direct connection to automotive battery rails including cold-crank (4.5 V) and load-dump (36 V) transients. |
| Output Voltage | Fixed 5.0 V ±1.5% - eliminates external resistor divider; enables plug-and-play 5-V rail generation for microcontrollers and sensors. |
| Max Output Current | 1 A continuous - sufficient for powering ADAS camera modules, infotainment SoCs, or body control unit peripherals. |
| Switching Frequency | 2.1 MHz (±14%) - allows use of compact 1–2.2 µH inductors and reduces EMI filtering requirements. |
| Reference Accuracy | ±1% at TJ = –40°C to +150°C - ensures tight output regulation across full automotive junction temperature range. |
| Min On-Time | 60 ns - enables high step-down ratios (e.g., 36 V → 5 V) without requiring frequency foldback at light loads. |
| Thermal Shutdown | 170°C shutdown / 158°C recovery - provides robust overtemperature protection with hysteresis for reliable automotive operation. |
Pinout & Package
SOT-23-6 package (2.90 mm × 1.60 mm), thermally enhanced with exposed pad (DBV variant), suitable for high-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB | Bootstrap capacitor connection | Connects 100-nF ceramic capacitor to SW; supplies gate drive voltage for integrated high-side FET. |
| GND | Power ground | Common return for internal low-side FET source, CIN, and COUT; requires short, low-inductance PCB trace to minimize noise. |
| FB | Feedback input | Internally connected to 5-V output node; no external divider required - simplifies layout and improves stability. |
| EN | Precision enable | Logic-controlled ON/OFF with 1.1–1.36 V turn-on threshold; supports system-level UVLO via external resistor divider. |
| VIN | Main input supply | Accepts 4–36 V; powers internal bias LDO and high-side driver; requires local 10-µF ceramic bypass capacitor. |
| SW | Switch node | Drives external power inductor; connects internally to drain of low-side FET and source of high-side FET. |
Key Features
| Feature | Design Value |
|---|---|
| FPWM operation | Enables constant 2.1-MHz switching across 0–1 A load, reducing output voltage ripple and easing EMI compliance vs. PFM variants. |
| Monotonic start-up | Prevents output voltage undershoot or reverse current when powering pre-biased rails - critical for hot-plug systems. |
| Hiccup-mode protection | Shuts down on short-circuit, waits 135 ms, then retries - limits average power dissipation and prevents thermal runaway. |
| Integrated synchronous rectification | Eliminates need for external Schottky diode; improves efficiency by ~8% at 1 A vs. asynchronous designs. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with full temperature cycling, HTOL, and ESD testing per automotive standards. |
Applications
| Body Electronics and Lighting | Infotainment and Cluster |
|---|---|
Use Scenario: Powering LED headlamp drivers and door module MCUs in 12-V vehicle architectures. IC Role / Device Role / Timing Role: Primary 5-V buck regulator supplying logic rails and CAN transceivers. Use Value: Delivers regulated 5 V at 1 A with <1.5% load regulation across 4–36 V input, supporting cold-crank and load-dump events without dropout. | Use Scenario: Supplying display interface ICs and audio codecs in digital instrument clusters. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter providing clean, low-noise 5-V rail for mixed-signal components. Use Value: FPWM mode maintains constant 2.1-MHz switching, minimizing conducted EMI into sensitive analog audio paths. |
| ADAS Camera Modules | General Purpose Wide VIN Power Supplies |
Use Scenario: Powering image sensor SoCs and ISP processors in rear-view and surround-view cameras. IC Role / Device Role / Timing Role: Compact, thermally robust 5-V supply with hiccup-mode fault recovery for safety-critical vision systems. Use Value: 170°C thermal shutdown and AEC-Q100 qualification ensure reliability under hood-mounted thermal stress. | Use Scenario: Replacing legacy linear regulators in industrial telematics gateways with wide-input-range requirements. IC Role / Device Role / Timing Role: Drop-in synchronous buck solution reducing board area and thermal load vs. LM2675-based designs. Use Value: SOT-23-6 footprint and internal compensation cut BOM count by ≥4 components versus controller-based alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR50410YFQDBVRQ1 | Same package and specs, but adjustable output (requires external FB divider); FPWM mode only. | Used where flexible output voltage (e.g., 3.3 V, 2.5 V) is needed instead of fixed 5 V. | Select when output voltage must be reconfigured per design; adds two resistors but retains identical thermal and transient performance. |
| TPS560430QDBVRQ1 | Pin-to-pin compatible; same 2.1-MHz FPWM, 4–36 V input, 1-A rating; differs in EN threshold (1.25 V vs. 1.23 V) and reference (0.8 V vs. 1.0 V). | Requires external resistor divider even for 5-V output; slightly lower quiescent current (75 µA vs. 120 µA). | Choose if existing layout uses TPS560430-Q1; no PCB change needed, but FB network must be added for 5-V operation. |
Compared with LMR50410Y5FQDBVRQ1, the LMR50410YFQDBVRQ1 offers output flexibility at the cost of added external components, while TPS560430QDBVRQ1 provides drop-in compatibility but requires redesign of the feedback network to achieve 5-V regulation.
Availability
LMR50410Y5FQDBVRQ1 is available at Aetrix Electronics and suitable for automotive body electronics, infotainment systems, and ADAS camera modules requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LMR50410Y5FQDBVRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with deep expertise in automotive-grade IC design and manufacturing.
The LMR50410-Q1 product line delivers compact, easy-to-use synchronous buck converters targeting automotive power conditioning - specifically engineered for body electronics, infotainment, and ADAS subsystems operating across harsh 4–36 V battery environments.
FAQ
What is the output voltage tolerance of the LMR50410Y5FQDBVRQ1 over temperature and load?
The LMR50410Y5FQDBVRQ1 delivers a fixed 5.0 V output with ±1.5% regulation over –40°C to +150°C junction temperature and 0–1 A load, as specified in the FPWM operation column of Section 7.8. This includes line, load, and temperature effects - verified across production lots and not limited to typical conditions.
Does the LMR50410Y5FQDBVRQ1 require external compensation components?
No, the LMR50410Y5FQDBVRQ1 features fully internal compensation. Its control loop is factory-tuned for stability with standard output capacitors (e.g., 22–47 µF ceramic), eliminating the need for external RC networks, phase-margin tuning, or loop-response measurement during design.
Can the LMR50410Y5FQDBVRQ1 operate with a 3.3-V input supply?
No - the LMR50410Y5FQDBVRQ1 has a minimum input voltage of 4 V, enforced by its undervoltage lockout (UVLO) with a rising threshold of 3.75 V. Operation below 4 V will cause the device to shut down; it is not rated for 3.3-V rail derivation.
What is the maximum recommended PCB copper area for thermal relief of the LMR50410Y5FQDBVRQ1 in SOT-23-6?
For optimal thermal performance, TI recommends a minimum 100 mm² copper pour connected to the exposed pad (GND) on the bottom layer, with ≥4 thermal vias (0.3-mm diameter) to inner/ground planes. This achieves RθJA ≈ 80°C/W on 2-layer boards - critical for sustaining 1-A load at 125°C ambient.
Is the LMR50410Y5FQDBVRQ1 pin-compatible with the PFM version LMR50410YQDBVRQ1?
Yes - the LMR50410Y5FQDBVRQ1 and LMR50410YQDBVRQ1 share identical SOT-23-6 (DBV) pinout, package dimensions, and PCB footprint. The only functional difference is internal configuration: one uses FPWM mode with fixed 5-V output, the other uses PFM mode with adjustable output.
LMR50410Y5FQDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
LMR50410Y5FQDBVRQ1 FAQ
1.How can I place an order for LMR50410Y5FQDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR50410Y5FQDBVRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LMR50410Y5FQDBVRQ1 reliable?
The price and inventory of LMR50410Y5FQDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR50410Y5FQDBVRQ1 is usually 5 days.
3.What payment methods are accepted for LMR50410Y5FQDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR50410Y5FQDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR50410Y5FQDBVRQ1?
LMR50410Y5FQDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR50410Y5FQDBVRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LMR50410Y5FQDBVRQ1?
For technical support, including LMR50410Y5FQDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR50410Y5FQDBVRQ1 requirements.
6.How does Aetrix verify that LMR50410Y5FQDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR50410Y5FQDBVRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LMR50410Y5FQDBVRQ1 meets industry standards.
7.What is the process for return or replacement of LMR50410Y5FQDBVRQ1?
All LMR50410Y5FQDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR50410Y5FQDBVRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LMR50410Y5FQDBVRQ1 part is unused and in its original packaging.
Return procedure for LMR50410Y5FQDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMR50410Y5FQDBVRQ1 Tags
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